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(11)

EP 3 759 956 A1

(12)

(43) Date of publication: 06.01.2021 Bulletin 2021/01 (21) Application number: 19709831.2 (22) Date of filing: 22.02.2019

(51) International Patent Classification (IPC):  H04W 12/00(2021.01) H04W 36/08(2009.01) H04W 36/30(2009.01) H04W 36/38(2009.01) H04W 12/04(2021.01) H04W 36/00(2009.01) H04W 36/16(2009.01) H04W 36/36(2009.01) H04W 84/12(2009.01) (86) International application number: PCT/US2019/019281 (87) International publication number: WO 2019/168764 (06.09.2019 Gazette 2019/36)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 01.03.2018 US 201815909823 (71) Applicant: Cisco Technology, Inc. San Jose, California 95134-1706 (US)	(72) Inventors: BHARTIA, Apurv San Mateo, California 94403 (US) LIN, Lizhen San Jose, California 95138 (US) (74) Representative: Noble, Nicholas et al Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)